Improvement in printers  type-cases



L. A. MARTIN.

Print ers Type-Cases.

No. 162,084. Patepted April13,1875.

WWW 5555 I THE GRAPHIC G0.PNOTOrLlTH-39&41 PARK PLAGE,N.Y

ITED STATES LUCIEN A. MARTIN, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN PRINTERS TYPE-CASES.

Specification forming part of Letters Patent No. 162,084, dated April13, 1875; application filed December 26, 1874.

To all whom it may concern Be it known that I, LUOIEN A. MARTIN, of SanFrancisco, in the cpunty of San Francisco and State of California, haveinvented certain new and useful Improvements in Printers Type-Cases; andI do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art towhich it pertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification, in which Figure l is aperspective view of a section of a printer's case embodying myimprotement; and Fig. 2 is a vertical transverse section thereof,exhibiting a side elevation and a sectional view of my improvement.

Corresponding parts in the two figures are designated by like letters.

This invention relates to a certain improvement in printers cases; andit consists in providing the false bottoms of their boxes with mandrelstraversed by a spiral thread or groove, by which their encirclingsprings may be vertically adjusted thereon, substantially as hereinaftermore fully set forth.

To enable others skilled in the art to which my invention appertains tomake and use the same, I will proceed to describe it.

In the annexed drawing, A refers to the upper left-hand section of aprinters case, with its boxes provided with false bottoms B B, securedupon mandrels C C, passing down through and guided in holes in thebottom D of the case. These mandrels are traversed by a spiral thread orgroove, c c, or provided with other suitable means by which theirencircling springs may be vertically adjusted thereon to permit of thesaid springs being moved away from the false bottoms, in order to takeup the slack or sag of the springs to restore their original tension, bywhich the type in the boxes may be kept flush with their upper edges. Assome printers have a strong, heavy motion, and to prevent their knockingthe type from their respective boxes in removing the same therefrom, thesize of the springs may be varied, so as to sink the bottoms of said'boxes, and the type below the upper surfaces of the latter, to obviatethis disadvam tage. E E are the springs encircling the mandrels C C,whose upper ends are compactly coiled into short tubes 0 e, to fit andreceive the said mandrels, to enable them to engage with the spiralthreads or screws of the lat ter. The lower ends of the said springsrest on the bottom D of the case.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

The mandrel C, with the spiral thread or groove 0 c and spring E e, incombination with the movable or false bottom B of the typebox of aprinters case, substantially as and for the purpose set forth.

, In testimony that I claim the foregoing as my own I hereunto affix mysignature in pres-' ence of two witnesses.

LUOIEN A. MARTIN.

Witnesses:

E. J. SMITH, GEO. DIETTERLE.

